Fluorescent lamp device with incandescent bulb type base cap

Details Fluorescent lamp device with incandescent bulb type base cap Fluorescent lamp device with incandescent bulb type base cap

1988-02-08

1989-06-20

Wieder, Kenneth

Electric lamp and discharge devices

With envelope

Having base and connector

313493, 313634, 439234, H01J 6130

Patent

active

048411930

ABSTRACT:
A fluorescent lamp device with an incandescent bulb type base cap. The fluorescent lamp device has a luminous tube unit and a case with one end supporting the luminous tube unit, and the other end has an outwardly projecting portion. A ballast is provided in the case, and a base cap is adapted to be rotatably fitted to the projecting portion of the case. The outer periphery of the projecting portion of the case has an engagement groove formed in it and a stopper portion which is formed in the axial direction of the case. An engagement portion, a guide groove and a rotation limiting groove having a rotation stopper portion are successively provided for the inner surface at one end of the base cap disposed in that order starting from the one end of the base cap. By fitting the engagement portion of the base cap in the engagement groove of the case, fitting one end of the projecting portion of the case in the guide groove of the base cap, fitting the stopper portion of the base cap in the rotation limiting groove of the base cap, and rotating the stopper portion so that it is fitted in the rotation limiting groove, the luminous tube unit and the case can be rotatably fitted to the base cap, and rotation of the stopper portion can be prevented by the rotation stopper portion.

REFERENCES:
patent: 4405877 (1983-09-01), Haraden et al.

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